Sheet-piling.



G. ZISTER;

, SHEET FILING.

APPLIOATION FILED SEPT. 8,-1906. RENEWED mm: 4. 1909.

932,230. Patented Aug. 24, 1909.- i

UNITED snares PATENT onnrcn GEORGE ZISTEB, OF CHICAGO; ILLINOIS.

SHEET-FILING:

Specification of Letters Patent. Patented Aug. 24:, 1909.

Application filed September 8, 1906, Serial No. 338,763. Renewed June 4, 1909. Serial No. 600,198.

To all whomit may concern:

-Be it known that I, GEORGE ZISTER, citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Im rovements in Sheet-Piling, of which the following is a specification.

This invention relates to improvements in metal sheet iling for use in the construction of sea-walls ievees, docks, cotter-dams, caissons, bridge-pier foundations and all similar work, whether of a permanent or temporary character;

, The general obf'ect of'my invention is to provide sheet pi in sections or members wherein the interloc ing features necessary, for holding the sections together when assembled, are made integral with the sections, which are identical in sectional form with one another. Thus the use of separate interlocking devices mechanically secured to the members is obviated. a

A more particular object of my invention is to provide a sheet piling member. of the.

character specified which maybe economic ally and rapidly formed by curling or bending the edges of the fiat plate or strip, into the peculiar conformation illustrated in the drawings and hereinafter described. The advanta e arising from the employment of a flat blan or plate is obvious, as no special rolls are necessary for manufacturing such plates.

In the drawings Figure 1 is a plan or end view of one of said lates or strips before it is acted upon by the bending rolls. Fig. 2 is a plan of a piling structure composed of a numer of my improved sections assembled; and Fig. 3 is an elevation of the same. I

In manufacturing the separate members, designated A, a flat plate or metal, as B, is passed through suitable mechanism which rolls or curves the longitudinal ed as thereof inwardlyas shown in Fig. 2, unti the inner edges 0 stand at a certain distance from the flat web portion of the members, whichdistance is slightl in excess of the thickness of the metal. T e two hooked edges, desighated D are symmetrical and formed upon the same face of the strip.

When two of the finished members are in- .faces of the hooked ed es D and the fiat portions adjacent the hoo ed edges.

In assembling the ilin members or sections they are loosey te esco ed together endwise, the form of interlock eing such-as to prevent any separation either laterally'.or otherwise in the operation of driving. The curved interlocking edges are both turned inward in the direction of each other on the same side. It is obvious that the inturnedhook edges may be on opposite sides of the web-plate instead of onthe same side as shown. At the same time-a sli ht angular variation may be allowable in i orming the Having thus described my invention, wh at I claim 1s interlocking curved walls by reason of the g mutual accommodation of the hook edges D.

1. A sheet-pilingwail structure composed I of a plurality of pihng sections having their r01 interlock, the interlocking ed es having four lines of contact, two of said nes being along the inner edges of the hook edges.

2. A sheetiling Wall structure, comprising a series of uplicate piling sections having their respective edges curved inward in forming a loose interlock and providing longitudinal spaces between the lines of contact respective edges curved inward ina loose when said sections are assembled edgewise.

3. A sheet-piling structure composed of a number of interlocking sections provided with integral inturned hook-edges, said hooked es having contact alon certain lines only and leaving longitudina spaces therebe-- tween. I

4. A sheethplilling structure composed of a lurality of p' g sections having interlocked hooked edges; each of said hooked edges makin contact with the interlocked hooked edge a ong four lines of contact, two of said 7 lines being along the inner edges of the hooked edges.

5. A sheet-piling structure comprising a series of alternately reversely arrengedpiling In testimony whereof I aflixmy signature, seetlons havin interlocked hooked edges; in. presence of two subscribing witnesses.

each hooked e e making contact with the interlocked hooized edge along four lines of GEORGE T f 5 contact, there being iongitudinal spaces be- Witnesses: tween said lines o contact or between the J. B. DoNALsoN,

- hooked edges of the sections. G. E. Cmmon. 

